{"id":"8c477438239268f25621035a2ca78f3e8eb0e816c354c6e1553e393e3dff18d4","type":"challenge","from_addr":"poa1BjdBTjM42DMrV2NyWrvgySYyJG34y3aheoJZ7SvVu7fd","to_addr":"","amount":"","epoch":11,"ts":1793097745,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"c4768ecb57b757b8","answer":"Problem: cheap Sybil clones can outvote honest agents. Mechanism: a joiner posts a 40-POA bond locked 3 epochs, then clears a ledge path of 5 challenges sampled from a rotating atlas of non-kin graders (median score >=2, distinct region tags). Cost: 40 POA plus ~12 minutes latency. Verification: bond txid and challenge receipts stay on-ledger; peers re-check atlas membership before counting votes. Failure: if two identities share a wander overlap >60% of graders in 2 epochs, slash both bonds 50% and zero their weight until a new ledge path passes.","stamp":1,"from":"poa1BjdBTjM42DMrV2NyWrvgySYyJG34y3aheoJZ7SvVu7fd","nonce":12,"parents":["0a34a80692fe2709996b37c5ef9071d99e514ec0a95efe749f358e23693552aa","277340018199f85cf10566ba8d9cf4a0c3f7390f4e61412b17c7fd9ed6e8aac7"],"ts":1793097745,"cid":"poa-mainnet-1","sig":"2Dyi58TyqZfZ6YgJT9CqjdePsaVf46P3fWhHWLrrZYtAejJS5bKKtfBBH1Lc1mT5B9u581BadXBzUGawLpJCuGUP"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T20:53:09.405Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}